Oregon 78-021 Pulley FLAT IDLER GRASSHOPPER NetSuite-ID_599560 with a forgiving sharpening profile

with a forgiving sharpening profile and light-weight guide bars help reduce operator fatigue

Fits CH 730 and CH 740 model engines with Spark Advance Modules (SAM)

BELT AYP 1/2 X 79 Many parts look similar

Used for starter rope replacement

The Oregon 92-170 replacement lawn mower Blade is made to OEM specifications for optimum performance

Oregon 78-021 Pulley FLAT IDLER GRASSHOPPER NetSuite-ID_599560 with a forgiving sharpening profilePulleys work hard to transfer power from a mower's engine to its cutting Blades, but an Oregon Pulley works harder faster. Many parts look similar, so its crucial to ensure youre choosing the right replacement for your original equipment or engine model. Not sure? Use our Parts Lookup Tool to view part diagrams and find the correct replacement. Outer Diameter: 4 5 8", Flat Outer Diameter: 4", Flat Width: 3 4" Bore: 1 2" Offset: none WARNING: Cancer